Chrome extension

Kaptionai

Turns WhatsApp Web voice messages into text, translates chats and summarises long conversations, for people who prefer reading to listening.

What it does

Kaptionai transcribes WhatsApp Web voice messages into text and adds translation and summaries to your chats in Chrome. It is aimed at people who would rather read than listen and who chat across languages.

Key features

  • Transcribes voice notes into text and summarizes long audio messages
  • Lets you search across every transcription you have made
  • Translates incoming messages and your replies as you type
  • Summarizes long conversations and reminds you to reply
  • Connects WhatsApp to Claude, ChatGPT and other MCP-compatible assistants

Use cases

  • Reading a long voice message in a meeting or quiet place
  • Chatting with contacts who write in another language
  • Catching up on a busy group chat

Getting started

Open WhatsApp Web after installing and use the Kaptionai controls on a voice message or chat to transcribe, translate or summarize.

Good to know

It only works on WhatsApp Web, and message audio and text are processed by AI services to produce transcripts and translations. It is a third-party tool, not made by WhatsApp.